Why is homosexual relationships ok, but not incest relationships? [self]

author: crackox (1 years) | author karma: 217/5233 | original story's comments | [flag](http://www.reddit.com/message/compose?to=%23atheismbot&subject=flag&message=Please describe why you are flagging this submission - http://www.reddit.com/r/atheism/comments/wbeac/why_is_homosexual_relationships_ok_but_not_incest/)

As the topic says.

Not trolling, currently in a discussion about lgbt and marriage, and they are using incest as a counter argument.

Pretty much every argument FOR homosexual marriage can also apply to incest relationships. The only real argument against incest relationships is that inbreeding results in a weaker gene pool, but they counter with 1) This inbreeding affect wont happen so quickly, 2) what if they simply dont have kids of their own and adopt like a homosexual relationship.

It's a tough point to counter argue, and I hope someone can give me some points.

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